Re: AUGraph mixer callback on inputs
Re: AUGraph mixer callback on inputs
- Subject: Re: AUGraph mixer callback on inputs
- From: William Stewart <email@hidden>
- Date: Fri, 15 May 2009 14:57:54 -0700
On May 15, 2009, at 2:17 PM, Etienne Gignac Bouchard wrote:
Thank you for your reply Bill.
I have looked at OpenAL before and it does look pretty straight
forward.
One question though: is it possible to call alSourcePlay() on multiple
sources and have them play at the same time ? (without any weird
hardware
conflict or anything ?)
There is no way to schedule openAL sources to begin playing at the
same time, so I don't think you could do this with OpenAL
That might be a stupid question but the mixer audio unit was giving
me a
warm and fuzzy feeling about this that I don't have with openAL...
Or can I add my openAL sources as input to my mixer ??
On 15/05/09 3:51 PM, "William Stewart" <email@hidden> wrote:
On May 15, 2009, at 10:40 AM, Etienne Gignac Bouchard wrote:
Good day.
I'm currently trying to play multiple wav files through a mixer and
with a
remoteIO as the output.
Right now I have an AUGraph with a mixer connected to the remoteIO.
I also
have preloaded my (wav) files in memory, using
AudioFileReadPackets() from
the AudioFile class. All is well so far.
But now I'm trying to bridge the gap between the audio buffers and
the mixer
inputs (16 of them).
How should I proceed ? Should I assign a callback function on every
input
of the mixer ?
yes - you have to
Too bad the AUAudioFilePlayer unit isn't available.
good feedback :) - please file a bug to request this addition
How would I proceed to do such a thing ?
so, every callback you set is attached to the input element of the
mixer you specify. presumably you want one file on one input, so if
you have 16 callbacks active, you have 16 files you want to playback
simultaneously.
So each callback will just read through the file associated with it.
I'm just wondering though - you might that OpenAL is easier to use -
it essentially does this, but gives you a separation between the
buffers that you attach to a given source (think of a source as a
single callback/input on the mixer, and the buffers are the bits of
the file that you have read). It then allows you to pan (locate in 3D
space) each source independently, changes its volume, and so forth.
We
have examples (oalTouch) that you might want to have a look at
Bill
Again, thank you.
Etienne
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